Re: C11 / VS 2019

On 30.07.25 00:11, David Rowley wrote:
> On Wed, 30 Jul 2025 at 00:57, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>>
>> David Rowley <dgrowleyml@gmail.com> writes:
>>> On Fri, 18 Jul 2025 at 23:12, Peter Eisentraut <peter@eisentraut.org> wrote:
>>>> Note that gcc and clang switched to C11 by default a long time ago
>>>> (gcc-5 and clang-3.6), so for most users all these tests won't need to
>>>> do anything.  If you want to test it, you could simulate an older
>>>> default like
>>>> ./configure CC='gcc -std=c99'
>>
>>> On Linux, doing a bit more testing using meson and clang, I tried with
>>> CC=clang CFLAGS=-std=c99 . I get:
>>
>> Note that that's not what Peter suggested.  That leads to
> 
> OK, thanks. There are no issues when I use CC="clang -std=c99" meson setup ...

This has been committed.  C11 is the default mode now.

David: You could rebase your other patch (about emulating 
__builtin_constant_p) now.

Tom: You ought to update the configuration on the buildfarm members 
longfin and sifaka from

'CC' => 'ccache clang -std=gnu99',

to

'CC' => 'ccache clang -std=gnu11',

for the master branch.